Sandpaper-holder.



0. A. BERGMAN.

SANDPAPER HOLDER.

APPLICATION FILED FEB. 13, 1911.

Patented May 20, 1913.

WITNESSES:

\ COLUMBIA PLANOGRAPH c0.,wAsHm0TON. D. C.

OSCAR A. BERG-MAN, 0F SEATTLE, WASHINGTON.

SANDPAPER-HOLDER.

Specification of Letters Patent.

Patented May 20,1913.

Application filed February 13, 1911. Serial No. 608,327.

To all whom it may concern Be it known that I, OSCAR A. BERGMAN,

a citizen of the United States, residing at Q tending outwardly therefrom and affording Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Sandpaper-Holders, of which the following is a specification.

This invention relates to sand-paper blocks or holders; and has for its object the provision of a device of said character of simple and inexpensive construction that is especially adapted to afford a backing for a piece of sand-paper in smoothing material having curved, angular or irregular surfaces.

The invention consists in the novel construction of a sand-paper block comprised of elements individually movable in vertical directions and thus affording a working surface conformable to the contours of the work upon which utilized.

The invention further consists in the combination and adaptation with the foregoing of parts and devices, as will be here inafter more fully described and set forth in the appended claims.

In the accompanying drawings, Figure 1 is a perspective view of an embodiment of my invention. Fig. 2 is a similar view of one of the block elements, shown detached. Fig. 3 is a cross-sectional view of the invention, illustrating its use.

. Referring to said drawings, the sandpaper block is composed of a plurality of elements, designated by the reference numeral 1, each formed with two oppositely disposed surfaces 2 in parallel planes. Said elements are desirably similar in form and may be of any suitable configuration. The preferred form of said elements illustrated in the views are of rectangular oblong configuration and are each provided with an elongated aperture 3 adjacent their respective ends. Such apertures have their major axis transversely to the major. axis of the respective elements and when assembled, such apertures are arranged to respectively register, thus affording two continuous uniform apertures through the block. Said elements are assembled in side by side relation, and having their apertures in approximate axial alinement. 4 are clampin plates adapted to be engaged longitudinalfy with the exposed surface 2 of the outermost of said elements and are each provided with holes 6 and. 7 in alinement with the respective said apertures 3. Said plates are formed with a raised peripheral rib 8 exa recess 9 therebetween. 10 are bolts passed through the respective said alined apertures 3 and each terminating at one end in an enlarged head adapted to seat in the countersunk hole 6 of one of said plates and at the other end 11 provided with screw threads for engagement in the threaded hole 7 of the opposite plate. The end 11 of said bolts may obviously be extended through therespective plate and secured with a nut, if desired.

The operation of the invention will be well understood from the foregoing description in connection with the accompanying drawings. It may be said, however, that said block elements are clamped together through the offices of said plates and the securing bolts to alford relative independent vertical movements therebetween. The

elongated form of the apertures 3 allows said vertical movement of the elements to a sufficient amountto effectively conform to the surface of almost any shape of lumber or molding M encountered. The sand-paper S is stretched across the bottom edges of the block and its ends brought over the peripheral rib 8 of the plates on opposite sides of the block where it may be secured in operative condition by the thumb and fingers of the operator grasping said plates thereover and clamping said paper firmly within the rekcesses 9 and binding the same over said r1 s.

In manually operating the device, it is drawn longitudinally of the lumber and of the block elements, the hand resting upon the top of the block and affording the amount of friction desired. In so doing, the block may be shifted slightly transversely of the work from time to time to overcome any tendency of the block-elements to travel unduly in the same paths and to insure the abrasion of the surface equally throughout.

The device is extremely simple in construct-ion and is highly efficient in practical use. It is capable of a wide range of adaptations and obvious changes in detail and modifications in the contour of the elements.

All such variations that fall within the scope of the following claim are contemplated in the spirit of this invention. v

and rectangular elements being elongated in a direction transverse the line of movement of the device whereby a sheet ofsand paper stretched over the surface of the rectangular 15 elements and having its ends lying in said platesmay be firmly grasped.

OSCAR A. BERGMAN.

What I claim as my invention, is-

In a device of the kind described, a body formed of a plurality of rectangular rigid elements arranged side by side, each of said elements being provided adjacent each end with a transversely-extending opening, rectangular plates extending longitudinally of the outer elements of said body each provided with an upstanding peripheral flange, and fastening means extending through said plates and rectangular elements, said plates Witnesses HORACE BARNES, E. PETERSON.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

